Attachment for arc-lamps.



No. 733,664. PATENTED JULY 14, 1903. S. LAWRENCE z R. O. NICHOLS.

ATTACHMENT FOR ARC LAMPSf APPLICATION FILED JAN. 2, 1903.

N0 MODEL.

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UNITED STATES Patented July 14, 1903.

FFICE.

ATENT ATTACHMENT Foe ARC-LAMPS.

SPECIFCATION forming part of Letters Patent No. 733,664, dated July 14, 1903.

Application filed January 2, 1903. Serial No. 137,399. (No model.)

To all whom it may concern.-

Be it known that we, STANLEY LAWRENCE and RoLDoN O. NICHOLS, citizens of the United States of America, and residents of Fostoria, in the county of Seneca and State of Ohio, have invented certain new and useful Improvements in Attachments for Arc- Lamps, of which the following is a specification.

This invention relates to certain new and useful improvements in electric lamps; and it has for its objects, among others, to provide a simple and cheap attachment or device for changing an open arc-lamp to a closed arclamp.

It has for a further object to provide such a construction as may be readily applied to any make of open arc-lamp and making of it a closed lamp.

The attachment is readily applied,'is simple in its construction, and most efficient in its operation.

Other objects and advantages of the invention will hereinafter appear, and the novel features thereof will be particularly pointed out in the appended claims.

The invention is clearly illustrated in the accompanying drawings, which, with the numerals of reference marked thereon, form a part of this specification, and in which- Figure 1 is an elevation showing the application of the present invention. Fig. 2 is an elevation, on a smaller scale, showing the invention applied to a double-carbon-rod lamp. Fig. 3 is a perspective View of the upper nut employed. Fig. 4 is a perspective View of the lower nut.

Like numerals of reference indicate like parts throughout the several views.

In carryingr out our invention we take any make of open arc-lamp and detach all the parts below the head or the part containing the mechanism of said lamp, thus leaving only the said head 1 with the coils and the other mechanism, the uppercarbon rod 2 with its carbon 3. The rods 4 forV supporting the base 5 may be retained, or we may supply new ones, as may be deemed best, the upper ends of said rods being retained in any suitable manner on the head.

Between the head and base We provide an inclosing jacket 6 with a door 7, hinged at S and having suitable fastening means This door permits of access to the interior of the jacket, so as to get at the carbon and carbonholder, and the jacket may be of any suitable material, such as sheet-iron or heavy tin, and its lower end rests upon and is supported by the base 5. The upper end of said jacket fits snugly against the underside of the head, and thus protects the carbon from the weather and aiding in making a closed lamp.

On the under side of the base is a globe l0, closed atits lower end, its upper end being open and iitted against the under side of the base and retained in any suitable manner. Within this globe is a carbon-holder 11 for the lower carbon 12, retained by a suitable fastening device 13, and the upper end of said carbon-holder being secured in the base, as indicated in Fig. 1, its lower portion being offset laterally, as seen, so as to bring the lower carbon in proper alinement with the upper carbon. f

While the globe 10 may be retained in position in any desiredrmanner, we have found the means herein disclosed to be veryveicient. It consists of a wire 14, the ends 15 of which extend through the base 5, Where they are retained in any suitable manner, as by being bent over upon the upper face of the base, as shown.

In addition to the globe 10 we sometimes provide an outer or storm globe 16, which is closed at its lower end and its upper end be-v ing open and having outwardly-extending iange 17, which ts snugly against the under side of the base 5-and is retained in position in the following manner: 18 is a rim or collar fitted around the neck of the globe and beneath said ange and is provided with two oppositely-disposed lugs 19, as seen in Eig. 1. 2O represents rods hinged at their lowerends, as at 21, to the outer ends of these lugs 19 and passed through slots 22 in the lower nuts 23, which are provided with the openings 24, through which pass the rods 4, andthrough the open-ended slots 25 of the upper nuts 26, which have the opening 27, through which the upper ends of the rods 4 pass. The upper ends of the rods 2O are provided with wingnuts or the like 2S, as seen in Fig. 1, by which the rods are held in their normal position by screwing the wing-nuts down on the ICO upper nuts 26, as will be readily understood upon reference to Fig. 1. When the outer globe is to be removed for any purpose, the wing-nu ts are loosened, which allows the rods 20, one or both, to be pulled or moved out-V wardly and clear of the walls of the slot 25, as indicated by dotted lines at the right of Fig. 1, when the outer globe can be readily pulled down for access to the inner globe. The rods being received in the slots 22 of the lower nuts 23, they may be readily moved downward through said slots, and when it is desired to close the globe the latter is moved upward and the rods move upward until the wing-nuts on the upper end thereof are in position to be slippedA in on top of the open slots 25, when the wing-nuts are tightened and the globe is secure. The openings 24 and 27 in the lower and upper nuts, respectively, are screw-threaded, as seen in Figs. 3 and 4, for the reception ot the threaded nuts of the rods 4, which may receive nuts on their ends, if necessary.

Fig. 2 shows the invention applied to a double-carbon-rod lamp. The lower-carbonrod holder 29 is attached centrally to the base, and at its lower end are the two horizontal portions 30 and 31, which support the lower carbons 32 and 33 in a well-known way. The

upper carbons 34 pass.through openings inV the base. The jacket 35 is provided with two doors 36 and 37, hinged, as at 38, so that either one may be opened to give access to either one of the carbons or carbon-holders. In other respects the device is the same as in the form just above described, the inner globe 10 and the outer globe v16 and the supporting-wire 14 for the inner globe being substantially the same as in the form illustrated in Fig. 1.

39 represents a sheet of asbestos or the like covering the under surface of the base and forming a cushion for the edges of the rims of the inner or outer globes. The openings in the base, and more particularly those through which the carbons pass, are lined with some suitable non-conducting material.

Modi'dcations in detail may be resorted to withoutdeparting from the spirit of the invention or sacrificing any of its advantages.

W'hat is claimed as new is- 1. In au attachment for an arclamp, a globe, a supporting-rim therefor, and a rod pivotally connected with said rim and detachably connected with the head and disposed outside of the supports for said head.

2. In an attachment for an arc-lamp, a globe, a supporting-rim therefor, a rod pivotally connected with said rim and detachably connected with the head and disposed outside of the supports for the head, and an inner globe supported from the base.

3. In an attachment for are-lamps, a globe, a rim receiving the upper end of said globe and having, horizontal lugs, rods pivotally connected with said lugs, and means connected with the head and having open-ended slots through which said rods pass.

4. In an attachment for arc-lamps, a globe, a rim receiving the upper end of said globe and having horizontal lugs, rods pivotally connected with said lugs, means connected with the head and having open-ended slots through which said rods pass, and slotted means connected with the base through which said rods pass, and wing-nuts on the upper ends of said rods. I

5. In an attachment for arc-lamps, a globe, a rim receiving the upper end of said globe and having horizontal lugs, rods pivotally connected with said lugs, means connected with the head and having open-ended slots through which said rods pass, slotted means connected with the base throughv which said rods pass, wing-nuts on the ends of said rods, and an inner globe having supporting means connected with the base.

Signed by us` at Fostoria, Ohio, this 30th day of December, 1902.

STANLEY LAVRENCE. ROLDON O. NICHOLS.

Witnesses:

R. L. UNDERwooD, GRACE HoLLoPATnR. 

